Grutas de Cacahuamilpa

31km/19mi to the north-east of Taxco and situated in the national park of the same name are the 1100 m (3609 ft) high dripstone caves Grutas de Cacahuamilpa (Náhuatl: "in the cacao fields"). Since their discovery in 1835, tunnels have been driven into the caves to a depth of over 16km/10mi without yet arriving at the limits of the cave system.

All kinds of different dripstone formations extending through 16 chambers, some of which are as much as 80 m (262 ft) wide and 77 m (253 ft) high, make these caves some of the largest and most interesting in Mexico.